<?php
/*
	WARNING! DO NOT EDIT THIS FILE!
	This file is part of the core Bizznis parent theme. 
	Please do all modifications in the form of a child theme.
*/

/**
 * Enable the author box for ALL users.
 *
 * @since 1.0.0
 */
function bizznis_enable_author_box( $args = array() ) {
	$args = wp_parse_args( $args, array( 'type' => 'single' ) );
	if ( 'single' === $args['type'] ) {
		add_filter( 'get_the_author_bizznis_author_box_single', '__return_true' );
	}
	elseif ( 'archive' === $args['type'] ) {
		add_filter( 'get_the_author_bizznis_author_box_archive', '__return_true' );
	}
}

/**
 * Redirect the user to an admin page, and add query args to the URL string for alerts, etc.
 *
 * @since 1.0.0
 */
function bizznis_admin_redirect( $page, array $query_args = array() ) {
	if ( ! $page ) {
		return;
	}
	$url = html_entity_decode( menu_page_url( $page, 0 ) );
	foreach ( (array) $query_args as $key => $value ) {
		if ( empty( $key ) && empty( $value ) ) {
			unset( $query_args[$key] );
		}
	}
	$url = add_query_arg( $query_args, $url );
	wp_redirect( esc_url_raw( $url ) );
}

/**
 * Redirect singular page to an alternate URL.
 *
 * @since 1.0.0
 */
add_action( 'template_redirect', 'bizznis_custom_field_redirect' );
function bizznis_custom_field_redirect() {
	if ( ! is_singular() ) {
		return;
	}
	if ( $url = bizznis_get_custom_field( 'redirect' ) ) {
		wp_redirect( esc_url_raw( $url ), 301 );
		exit;
	}
}

/**
 * Return a specific value from the associative array passed as the second argument to 'add_theme_support()'.
 *
 * @since 1.0.0
 * @param string $feature The theme feature.
 * @param string $arg     The theme feature argument.
 * @param string $default Optional. Fallback if value is blank or doesn't exist.
 *                        Default is empty string.
 *
 * @return mixed Return value if associative array, true if indexed array, or
 *               $default if theme doesn't support $feature or $arg doesn't exist.
 */
function bizznis_get_theme_support_arg( $feature, $arg, $default = '' ) {
	$support = get_theme_support( $feature );

	if ( ! $arg &&  $support ) {
		return true;
	}
	if ( ! $support || ! isset( $support[0] ) ) {
		return $default;
	}
	if ( array_key_exists( $arg, (array) $support[0] ) ) {
		return $support[0][ $arg ];
	}
	if ( in_array( $arg, (array) $support[0] ) ) {
		return true;
	}

	return $default;
}

/**
 * Detect active plugin by constant, class or function existence.
 *
 * @since 1.0.0
 */
function bizznis_detect_plugin( array $plugins ) {
	# Check for classes
	if ( isset( $plugins['classes'] ) ) {
		foreach ( $plugins['classes'] as $name ) {
			if ( class_exists( $name ) ) {
				return true;
			}
		}
	}
	# Check for functions
	if ( isset( $plugins['functions'] ) ) {
		foreach ( $plugins['functions'] as $name ) {
			if ( function_exists( $name ) ) {
				return true;
			}
		}
	}
	# Check for constants
	if ( isset( $plugins['constants'] ) ) {
		foreach ( $plugins['constants'] as $name ) {
			if ( defined( $name ) ) {
				return true;
			}
		}
	}
	
	# No class, function or constant found to exist
	return false;
}

/**
 * Check that we're targeting a specific Bizznis admin page.
 *
 * @since 1.0.0
 */
function bizznis_is_menu_page( $pagehook = '' ) {
	global $page_hook;
	if ( isset( $page_hook ) && $page_hook == $pagehook ) {
		return true;
	}
	# May be too early for $page_hook
	if ( isset( $_REQUEST['page'] ) && $_REQUEST['page'] == $pagehook ) {
		return true;
	}
	# May be too early for $page_hook
	if ( isset( $_REQUEST['tab'] ) && $_REQUEST['tab'] == $pagehook ) {
		return true;
	}
	# May be too early for $page_hook
	if ( isset( $_REQUEST['section'] ) && $_REQUEST['section'] == $pagehook ) {
		return true;
	}
	
	return false;
}

/**
 * Check whether we are currently viewing the site via the WordPress Customizer.
 *
 * @since 1.0.0
 */
function bizznis_is_customizer() {
	global $wp_customize;
	
	return is_a( $wp_customize, 'WP_Customize_Manager' ) && $wp_customize->is_preview(); 
}

/**
 * Get the 'post_type' from the global '$post' if supplied value is empty.
 *
 * @since 1.0.0
 */
function bizznis_get_global_post_type_name( $post_type_name = '' ) {
	if ( ! $post_type_name ) {
		$post_type_name = get_post_type();
		if ( false === get_post_type() ) {
			$post_type_name = get_query_var( 'post_type' );
		}
	}
	
	return $post_type_name;
}

/**
 * Determine if theme support bizznis-accessibility is activated by the child theme.
 * Assumes the presence of a screen-reader-text class in the stylesheet (required generated class as from WordPress 4.2)
 *
 * Adds screen-reader-text by default.
 * Skip links to primary navigation, main contant, sidebars and footer, semantic headings and a keyboard accessible drop-down-menu
 * can be added as extra features as: 'skip-links', 'headings', 'drop-down-menu'
 *
 * @since 1.2.0
 *
 * @param string $arg Optional. Specific accessibility feature to check for support.
 *                    Accepts `drop-down-menu` and `headings`. Default is empty string.
 *
 * @return bool True if current theme supports bizznis-accessibility, or an specific feature of it, false otherwise.
 */
function bizznis_a11y( $arg = '' ) {
	$feature = 'bizznis-accessibility';
	# No args
	if ( empty( $arg ) ) {
		return current_theme_supports( $feature );
	}
	# Get accessibility theme support
	$support = get_theme_support( $feature );
	# No support for feature.
	if ( ! $support ) {
		return false;
	}
	# No args passed in to add_theme_support(), so accept all.
	if ( ! isset( $support[0] ) ) {
		return true;
	}
	
	# Support for specific arg found.
	if ( in_array( $arg, $support[0] ) ) {
		return true;
	}
}

/**
 * Build links to install plugins.
 *
 * @since 1.0.0
 */
function bizznis_plugin_install_link( $plugin_slug = '', $text = '' ) {
	if ( is_main_site() ) {
		$url = network_admin_url( 'plugin-install.php?tab=plugin-information&plugin=' . $plugin_slug . '&TB_iframe=true&width=600&height=550' );
	}
	else {
		$url = admin_url( 'plugin-install.php?tab=plugin-information&plugin=' . $plugin_slug . '&TB_iframe=true&width=600&height=550' );
	}
	
	return sprintf( '<a href="%s" class="thickbox">%s</a>', esc_url( $url ), esc_html( $text ) );
}

/**
 * Check if the root page of the site is being viewed.
 *
 * is_front_page() returns false for the root page of a website when
 * - the WordPress "Front page displays" setting is set to "A static page"
 * - "Front page" is left undefined
 * - "Posts page" is assigned to an existing page
 *
 * This function checks for is_front_page() or the root page of the website
 * in this edge case.
 *
 * @since 2.2.0
 *
 * @return bool True if this is the root page of the site, false othewise.
 */
function bizznis_is_root_page() {
	if ( is_front_page() || ( is_home() && get_option( 'page_for_posts' ) && ! get_option( 'page_on_front' ) && ! get_queried_object() ) ) {
		return true;
	}
	
	return false;
}